<template>
    <div class="login-container">
        <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">
            <h3 class="title">一页一世界后台管理系统</h3>
            <el-form-item prop="username">
                <span class="svg-container">
                    <svg-icon icon-class="user" />
                </span>
                <el-input v-model="loginForm.username" name="username" type="text" auto-complete="on" placeholder="username" />
            </el-form-item>
            <el-form-item prop="password">
                <span class="svg-container">
                    <svg-icon icon-class="password" />
                </span>
                <el-input :type="pwdType" v-model="loginForm.password" name="password" auto-complete="on" placeholder="password" @keyup.enter.native="handleLogin" />
                <span class="show-pwd" @click="showPwd">
                    <svg-icon :icon-class="pwdType === 'password' ? 'eye' : 'eye-open'" />
                </span>
            </el-form-item>
            <el-form-item>
                <el-button :loading="loading" type="primary" style="width:100%;" @click.native.prevent="handleLogin">登录</el-button>
            </el-form-item>
        </el-form>
    </div>
</template>
<script>
import { isvalidUsername } from '@/utils/validate'

export default {
    name: 'Login',
    data() {
        const validateUsername = (rule, value, callback) => {
            if (!isvalidUsername(value)) {
                callback(new Error('请输入正确的用户名'))
            } else {
                callback()
            }
        }
        const validatePass = (rule, value, callback) => {
            if (value.length < 5) {
                callback(new Error('密码不能小于5位'))
            } else {
                callback()
            }
        }
        return {
            loginForm: {
                username: 'admin',
                password: 'admin'
            },
            loginRules: {
                username: [{ required: true, trigger: 'blur', validator: validateUsername }],
                password: [{ required: true, trigger: 'blur', validator: validatePass }]
            },
            loading: false,
            pwdType: 'password',
            redirect: undefined
        }
    },
    watch: {
        $route: {
            handler: function(route) {
                this.redirect = route.query && route.query.redirect
            },
            immediate: true
        }
    },
    methods: {
        showPwd() {
            if (this.pwdType === 'password') {
                this.pwdType = ''
            } else {
                this.pwdType = 'password'
            }
        },
        handleLogin() {
            this.$refs.loginForm.validate(valid => {
                if (valid) {
                    this.loading = true
                    this.$store.dispatch('Login', this.loginForm).then(() => {
                        this.loading = false
                        this.$router.push({ path: this.redirect || '/' })
                    }).catch(() => {
                        this.loading = false
                    })
                } else {
                    console.log('error submit!!')
                    return false
                }
            })
        }
    }
}

</script>
<style rel="stylesheet/scss" lang="scss">
$bg:#2d3a4b;
$light_gray:#eee;

/* reset element-ui css */
.login-container {
    .el-input {
        display: inline-block;
        height: 47px;
        width: 85%;

        input {
            background: transparent;
            border: 0px;
            -webkit-appearance: none;
            border-radius: 0px;
            padding: 12px 5px 12px 15px;
            color: $light_gray;
            height: 47px;

            &:-webkit-autofill {
                -webkit-box-shadow: 0 0 0px 1000px $bg inset !important;
                -webkit-text-fill-color: #fff !important;
            }
        }
    }

    .el-form-item {
        border: 1px solid rgba(255, 255, 255, 0.1);
        background: rgba(0, 0, 0, 0.1);
        border-radius: 5px;
        color: #454545;
    }
}

</style>
<style rel="stylesheet/scss" lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
    position: fixed;
    height: 100%;
    width: 100%;
    background-color: $bg;

    .login-form {
        position: absolute;
        left: 0;
        right: 0;
        width: 520px;
        max-width: 100%;
        padding: 35px 35px 15px 35px;
        margin: 120px auto;
    }

    .tips {
        font-size: 14px;
        color: #fff;
        margin-bottom: 10px;

        span {
            &:first-of-type {
                margin-right: 16px;
            }
        }
    }

    .svg-container {
        padding: 6px 5px 6px 15px;
        color: $dark_gray;
        vertical-align: middle;
        width: 30px;
        display: inline-block;
    }

    .title {
        font-size: 26px;
        font-weight: 400;
        color: $light_gray;
        margin: 0px auto 40px auto;
        text-align: center;
        font-weight: bold;
    }

    .show-pwd {
        position: absolute;
        right: 10px;
        top: 7px;
        font-size: 16px;
        color: $dark_gray;
        cursor: pointer;
        user-select: none;
    }
}

</style>
